Keep your chin up means stay cheerful when things are hard. Keep your chin up, it will pass.
It offers encouragement rather than help, which is either kind or annoying depending on the day. The picture is of a head held up rather than hanging.
1phrasekeep your chin upTo stay cheerful when things are hard.
“She told him to keep your chin up and rang again on Sunday.”
keep your chin up is a phrase.
Practised in Idioms